64 lines
1.7 KiB
Go
64 lines
1.7 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package dirfs
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import (
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"context"
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"io/fs"
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"os"
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"github.com/tailscale/xnet/webdav"
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"tailscale.com/tailfs/tailfsimpl/shared"
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)
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// OpenFile implements interface webdav.Filesystem.
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func (dfs *FS) OpenFile(ctx context.Context, name string, flag int, perm os.FileMode) (webdav.File, error) {
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_, isStaticRoot := dfs.trimStaticRoot(name)
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if !isStaticRoot && !shared.IsRoot(name) {
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// Show a folder with no children to represent the requested child. In
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// practice, the children of this folder are never read, we just need
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// to give webdav a file here which it uses to call file.Stat(). So,
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// even though the Child may in fact have its own children, it doesn't
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// matter here.
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return &shared.DirFile{
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Info: shared.ReadOnlyDirInfo(name, dfs.now()),
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LoadChildren: func() ([]fs.FileInfo, error) {
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return nil, nil
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},
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}, nil
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}
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di, err := dfs.Stat(ctx, name)
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if err != nil {
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return nil, err
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}
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if dfs.StaticRoot != "" && !isStaticRoot {
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// Show a folder with a single subfolder that is the static root.
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return &shared.DirFile{
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Info: di,
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LoadChildren: func() ([]fs.FileInfo, error) {
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return []fs.FileInfo{
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shared.ReadOnlyDirInfo(dfs.StaticRoot, dfs.now()),
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}, nil
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},
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}, nil
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}
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// Show a folder with one subfolder for each Child of this FS.
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return &shared.DirFile{
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Info: di,
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LoadChildren: func() ([]fs.FileInfo, error) {
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childInfos := make([]fs.FileInfo, 0, len(dfs.Children))
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for _, c := range dfs.Children {
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if c.isAvailable() {
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childInfo := shared.ReadOnlyDirInfo(c.Name, dfs.now())
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childInfos = append(childInfos, childInfo)
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}
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}
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return childInfos, nil
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},
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}, nil
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}
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